选用三种不同碳、铬含量的耐磨钢，通过热处理获得不同数量的二次碳化物和马氏体基体。研究了二次碳化物对基体三体磨粒磨损特性的影响．试验结果表明；当切削磨损机理占主导地位时，二次碳化物对基体抗磨粒磨损能力提高有利；当低周塑变疲劳磨损占主导地位时，二次碳化物对基体抗磨粒磨损能力提高不利。 Three kinds of wear-resistant steel with different carbon and chromium content are selected, and different amounts of secondary carbides and martensite matrix are obtained through heat treatment. The effect of secondary carbides on wear characteristics of three-body abrasive grains was studied. The experimental results show that when the wear mechanism of cutting is dominated, the secondary carbides are more effective to improve the wear resistance of the matrix. When the fatigue of low plastic deformation dominated, the wear resistance of the secondary carbides to the matrix Improve disadvantage.